Photoelectron diffraction study of the Ag(110)-(2 x 1)-O reconstruction

The structure of the (2 x 1)-O adsorption phase on Ag(110) has been determi ned using scanned-energy mode photoelectron diffraction. The oxygen atoms h ave been found to occupy the long-bridge site and are almost coplanar with the top layer of silver atoms. The best agreement between multiple-scatteri ng theory and experiment has been obtained for a missing-row (or equivalent ly an 'added-row') reconstruction in which the first-to-second and second-t o-third interlayer spacings are 1.55 +/- 0.06 Angstrom and 1.33 +/- 0.06 An gstrom, respectively. Alternative buckled-row and unreconstructed surface m odels can be excluded. (C) 2000 Elsevier Science B.V. All rights reserved.